CN110864365A - Air conditioner control method and air conditioner indoor unit - Google Patents

Air conditioner control method and air conditioner indoor unit Download PDF

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Publication number
CN110864365A
CN110864365A CN201810942900.6A CN201810942900A CN110864365A CN 110864365 A CN110864365 A CN 110864365A CN 201810942900 A CN201810942900 A CN 201810942900A CN 110864365 A CN110864365 A CN 110864365A
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CN
China
Prior art keywords
air
air outlet
pipe
front side
flow
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Granted
Application number
CN201810942900.6A
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Chinese (zh)
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CN110864365B (en
Inventor
戴现伟
王永涛
孙亚琼
闫宝升
关婷婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201810942900.6A priority Critical patent/CN110864365B/en
Publication of CN110864365A publication Critical patent/CN110864365A/en
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Publication of CN110864365B publication Critical patent/CN110864365B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides an air conditioner control method and an air conditioner indoor unit, wherein the air conditioner indoor unit comprises a shell with an air inlet area and two air supply fans, and an upper air outlet and a lower air outlet are formed in the front side of the shell; one of the blower fans is configured to cause a portion of the airflow to flow from the air inlet region toward the upper portion of the accommodating space so that the portion of the airflow is blown out from the upper outlet, and the other blower fan is configured to cause a portion of the airflow to flow from the air inlet region toward the lower portion of the accommodating space so that the portion of the airflow is blown out from the lower outlet. The air conditioner control method comprises the step of respectively controlling the states of the two air supply fans according to the operation mode of the air conditioner, so that the refrigerating and heating experience is improved conveniently.

Description

Air conditioner control method and air conditioner indoor unit
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner control method and an air conditioner indoor unit.
Background
The existing wall-mounted air conditioner indoor unit generally uses a cross-flow fan and a bent heat exchanger to supply air to an air outlet, the air supply range is limited, the air supply mode is fixed and inflexible, and the requirements of comfort and diversity of users are difficult to meet.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an air conditioner control method and an air conditioner indoor unit that overcome or at least partially solve the above problems.
A further object of the present invention is to improve the air supply effect and efficiency of the indoor unit.
The invention provides an air conditioner control method, which comprises the following steps:
a casing which is provided with an air inlet area, an upper air outlet is formed at the upper part of the front side of the casing, and a lower air outlet is formed at the lower part of the front side of the casing;
two air supply fans arranged in the accommodating space inside the shell, wherein one air supply fan is configured to promote partial air flow to flow from the air inlet area to the upper part of the accommodating space so as to enable the partial air flow to be blown out from the upper air outlet, and the other air supply fan is configured to promote partial air flow to flow from the air inlet area to the lower part of the accommodating space so as to enable the partial air flow to be blown out from the lower air outlet;
the control method of the air conditioner comprises the following steps:
the states of the two air supply fans are respectively controlled according to the operation mode of the air conditioner.
Optionally, the step of respectively controlling the states of the two blowing fans according to the operation mode of the air conditioner specifically includes:
in the cooling mode, the air supply fan for driving partial air flow to the upper part of the accommodating space is controlled to be started;
in the heating mode, the blower fan for driving partial airflow to flow to the lower part of the holding space is controlled to be turned on.
Optionally, the step of respectively controlling the states of the two air supply fans according to the operation mode of the air conditioner specifically includes:
in the refrigeration mode, the two air supply fans are controlled to be started simultaneously, the air supply fan which enables partial air flow to the upper part of the accommodating space is controlled to operate at a first rotating speed, and the air supply fan which enables partial air flow to the lower part of the accommodating space is controlled to operate at a second rotating speed; the first rotational speed is greater than the second rotational speed.
Optionally, after the air supply fan for causing part of the air flow to the upper part of the accommodating space is operated at a first rotation speed, and the air supply fan for causing part of the air flow to the lower part of the accommodating space is operated at a second rotation speed, the method further comprises:
monitoring the indoor environment temperature;
if the indoor environment temperature reaches the preset temperature, the first rotating speed of the air supply fan for promoting partial air flow to the upper part of the accommodating space is reduced.
Optionally, the upper air outlet and the lower air outlet are marked as two air outlets of the indoor unit;
the indoor unit also comprises two air outlet pipes extending forwards and backwards, wherein one air outlet pipe is positioned above the other air outlet pipe, and the air outlet pipe positioned above corresponds to the upper air outlet and is communicated with the fan air outlet of the air supply fan for promoting partial air flow to the upper part of the accommodating space; the lower air outlet pipe corresponds to the lower air outlet and is communicated with the fan air outlet of the air supply fan which promotes partial air flow to the lower part of the accommodating space;
each air outlet pipe is configured to be controllably moved along the front-back direction between a position protruding out of the front side of the corresponding air outlet and a position retracting into the corresponding air outlet;
each air outlet pipe comprises an outer pipe extending forwards and backwards, a first inner pipe connected to the inner peripheral wall of the outer pipe and extending forwards in a gradually expanding manner to protrude out of the front side of the outer pipe, and a second inner pipe extending forwards in a gradually expanding manner in the corresponding first inner pipe; the air inlet end of the first inner pipe is positioned in the outer pipe and close to the front end of the outer pipe, a first spacing space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe, and a second spacing space is formed between the outer peripheral wall of the second inner pipe and the inner peripheral wall of the first inner pipe;
when the air outlet pipe retracts to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted with the inner peripheral wall of the corresponding air outlet so as to seal the first interval space, so that part of air flow is blown out from the second interval space to the front side, and part of air flow is blown out from the first inner pipe to the front side;
when the air outlet pipe is positioned at a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes out of the front side of the corresponding air outlet so as to expose the first interval space, so that part of air flow is blown out of the first interval space to the front side, part of air flow is blown out of the second interval space to the front side, and part of air flow is blown out of the first inner pipe to the front side;
the control method of the air conditioner further includes:
in the refrigeration mode, the air outlet pipe corresponding to the upper air outlet is controlled to move to a position protruding out of the front side of the upper air outlet;
and in the heating mode, the air outlet pipe corresponding to the lower air outlet is controlled to move to a position protruding out of the front side of the lower air outlet.
According to another aspect of the present invention, there is also provided an indoor unit of an air conditioner, including:
a casing which is provided with an air inlet area, an upper air outlet is formed at the upper part of the front side of the casing, and a lower air outlet is formed at the lower part of the front side of the casing;
two air supply fans arranged in the accommodating space inside the shell, wherein one air supply fan is configured to promote partial air flow to flow from the air inlet area to the upper part of the accommodating space so as to enable the partial air flow to be blown out from the upper air outlet, and the other air supply fan is configured to promote partial air flow to flow from the air inlet area to the lower part of the accommodating space so as to enable the partial air flow to be blown out from the lower air outlet;
and a control unit configured to control states of the two blowing fans respectively according to an operation mode of the air conditioner.
Optionally, the control unit is further configured to control, in the cooling mode, a blower fan for causing a part of the airflow to flow to the upper part of the accommodating space to be turned on; in the heating mode, the blowing fan for making partial air flow to the lower part of the holding space is controlled to be turned on.
Optionally, the control unit is further configured to control the two air supply fans to be turned on simultaneously, and control the air supply fan for causing a part of the air flow to the upper part of the accommodating space to operate at a first rotation speed, and control the air supply fan for causing another part of the air flow to the lower part of the accommodating space to operate at a second rotation speed, when in the cooling mode; the first rotational speed is greater than the second rotational speed.
Optionally, the indoor unit of air conditioner further includes:
the temperature sensor is used for monitoring the indoor environment temperature;
the control unit is further configured to reduce a first rotation speed of a blower fan that causes a part of the airflow to flow toward an upper portion of the accommodating space when the indoor ambient temperature reaches a preset temperature.
Optionally, the upper air outlet and the lower air outlet are marked as two air outlets of the indoor unit;
the indoor unit also comprises two air outlet pipes extending forwards and backwards, wherein one air outlet pipe is positioned above the other air outlet pipe, and the air outlet pipe positioned above corresponds to the upper air outlet and is communicated with the fan air outlet of the air supply fan for promoting partial air flow to the upper part of the accommodating space; the lower air outlet pipe corresponds to the lower air outlet and is communicated with the fan air outlet of the air supply fan which promotes partial air flow to the lower part of the accommodating space;
each air outlet pipe is configured to be controllably moved along the front-back direction between a position protruding out of the front side of the corresponding air outlet and a position retracting into the corresponding air outlet;
each air outlet pipe comprises an outer pipe extending forwards and backwards, a first inner pipe connected to the inner peripheral wall of the outer pipe and extending forwards in a gradually expanding manner to protrude out of the front side of the outer pipe, and a second inner pipe extending forwards in a gradually expanding manner in the corresponding first inner pipe; the air inlet end of the first inner pipe is positioned in the outer pipe and close to the front end of the outer pipe, a first spacing space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe, and a second spacing space is formed between the outer peripheral wall of the second inner pipe and the corresponding inner peripheral wall of the first inner pipe;
when the air outlet pipe retracts to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted with the inner peripheral wall of the corresponding air outlet so as to seal the first interval space, so that part of air flow is blown out from the second interval space to the front side, and part of air flow is blown out from the first inner pipe to the front side;
when the air outlet pipe is positioned at a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes out of the front side of the corresponding air outlet so as to expose the first interval space, so that part of air flow is blown out of the first interval space to the front side, part of air flow is blown out of the second interval space to the front side, and part of air flow is blown out of the first inner pipe to the front side;
the control unit is also configured to control the air outlet pipe corresponding to the upper air outlet to move to a position protruding out of the front side of the upper air outlet in the refrigeration mode; and when in the heating mode, the air outlet pipe corresponding to the lower air outlet is controlled to move to a position protruding out of the front side of the lower air outlet.
The air conditioner control method and the air conditioner indoor unit are provided with the two air outlets and the two air supply fans, wherein the two air outlets are mutually set off, so that the vision-caused salience of one air outlet is avoided, the overall appearance of the indoor unit is more harmonious and beautiful, and the higher aesthetic requirement of a user is met; in addition, the two air supply fans can be controlled to operate independently, so that the opening of the different air supply fans can be controlled respectively according to different operation modes of the indoor unit of the air conditioner, and the refrigerating and heating experience can be improved.
Furthermore, in the air conditioner control method and the air conditioner indoor unit, the two air outlets are respectively provided with the air outlet pipes which can be controlled to move back and forth in a corresponding mode, and the two air outlet pipes can be independently controlled to move, so that the movement of the two air outlet pipes can be conveniently controlled according to different operation modes of the air conditioner indoor unit, and the refrigerating and heating experience is further improved; in addition, through the special back-and-forth movement of air-out pipe and air-out pipe of structure, can adjust air-out scope, air-out distance, air-out homogeneity and the air supply efficiency of two air outlets of indoor set respectively, strengthen indoor set air supply effect, promote user's comfortable nature experience.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view of an external configuration of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of an indoor unit of an air conditioner according to an embodiment of the present invention, in which a front panel is hidden to show the internal structure of the indoor unit;
fig. 3 is an exploded schematic view of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a guide cover of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 5 is an exploded schematic view of an indoor unit of an air conditioner according to another embodiment of the present invention;
fig. 6 is a schematic structural view of one direction of an outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating an outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention; and
fig. 8 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention.
Detailed Description
An air conditioning indoor unit 10 and a control method of an air conditioner according to an embodiment of the present invention are described below with reference to fig. 1 to 8. Where the orientations or positional relationships indicated by the terms "front", "back", "upper", "lower", "inner", "outer", "lateral", etc., are based on the orientations or positional relationships shown in the drawings, they are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Fig. 1 is a schematic view showing an external configuration of an air conditioning indoor unit 10 according to an embodiment of the present invention, and fig. 2 is a schematic view showing an internal configuration of the air conditioning indoor unit 10 according to an embodiment of the present invention, in which a front panel 12 is hidden to show the internal configuration of the indoor unit 10.
As shown in fig. 1 and 2, the indoor air conditioner 10 of the present embodiment is a wall-mounted indoor air conditioner, and includes a casing and two blower fans disposed in an accommodating space inside the casing. The casing is formed with air inlet area 11a and two air outlets, and an air outlet forms in casing front side upper portion, marks as upper air outlet 12a, and another air outlet forms in casing front side lower part, marks as lower air outlet 12 b. One of the two blower fans is configured to cause a part of the air flow to flow from the air intake area 11a toward the upper portion of the accommodating space so that the part of the air flow is blown out from the upper outlet 12a, and the other blower fan is configured to cause a part of the air flow to flow from the air intake area 11a toward the lower portion of the accommodating space so that the part of the air flow is blown out from the lower outlet 12 b.
The indoor unit 10 of the air conditioner of this embodiment further includes a control unit, and since the indoor unit 10 has two independent air supply fans and two independent air outlets, the states of the two air supply fans can be controlled according to the operation mode of the indoor unit 10 to control the air outlet position, thereby achieving better heating/cooling effect and improving air supply comfort. Specifically, the control unit may be configured to control the states of the two blowing fans, respectively, according to the operation mode of the air conditioner.
Specifically, in some embodiments, the control unit is further configured to control, in the cooling mode, the blower fan for causing a part of the airflow to flow toward the upper portion of the accommodating space of the casing to be turned on. Under the action of the air supply fan, cold air flows to the upper part and is blown out forwards through the upper air outlet 12a, while the other air supply fan (the air supply fan which promotes partial air flow to flow towards the lower part of the accommodating space in the shell) keeps a closed state, and the cold air is blown out forwards only from the upper air outlet 12a, so that the air outlet position of the cold air is raised, and the discomfort of a user caused by the fact that the cold air is blown downwards and directly blown to the user is avoided. Because cold wind has the trend of sinking, make cold wind upwards blow as far as possible, promote refrigeration effect, and avoid cold wind directly to blow the human body and influence user's refrigeration experience.
When in the heating mode, the control unit is configured to control the air supply fan which causes part of the air flow to the lower part of the accommodating space to be opened, the other air supply fan (the air supply fan which causes part of the air flow to the upper part of the accommodating space in the shell) is closed, hot air is blown out forwards from the lower air outlet 12b, the hot air outlet position is reduced, and the situation that the temperature of the lower indoor space cannot be raised in time due to rising of hot air is avoided, so that the heating experience of a user is influenced. Because hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved.
In other embodiments, the control unit may be configured to control the two blowing fans to be turned on simultaneously, and to control the blowing fan that causes a portion of the airflow to flow to the upper portion of the accommodating space to operate at a first rotation speed, and to control the blowing fan that causes another portion of the airflow to flow to the lower portion of the accommodating space to operate at a second rotation speed, wherein the first rotation speed is greater than the second rotation speed, in the cooling mode. That is to say, during the refrigeration mode, two air supply fans operate with different rotational speeds, and the air supply fan that control corresponds with last air outlet operates with higher wind speed, increases the air output of last air outlet, and the cold wind that blows off by last air outlet sinks, reduces indoor ambient temperature fast.
In some embodiments, the indoor unit 10 further includes a temperature sensor for monitoring the indoor environment temperature, and the control unit is further configured to reduce a first rotation speed of the air supply fan for causing a portion of the air flow to the upper portion of the accommodating space and a second rotation speed of the air supply fan for causing a portion of the air flow to the lower portion of the accommodating space when the indoor environment temperature reaches a preset temperature, that is, when the indoor environment temperature is reduced to a certain temperature, in order to avoid the indoor environment temperature from being too low, the air output of the upper air outlet can be reduced, so as to maintain the indoor environment within a proper temperature range.
In some embodiments, the projection of the casing on the vertical plane for carrying the air conditioning indoor unit 10 is circular, and the projections of the upper air outlet 12a and the lower air outlet 12b on the vertical plane are both circular, so that the whole air conditioning indoor unit 10 has a unique and attractive appearance, is completely different from the existing long-strip-shaped wall-mounted air conditioning indoor unit 10, and meets the personalized aesthetic requirement of a user.
In the existing solutions, each air-conditioning indoor unit 10 with a similar shape has an air outlet and an air supply fan, and in order to meet the air supply requirement of the air-conditioning indoor unit 10, the air supply fan has a large power and a large volume, which results in a large overall thickness (the size of the air-conditioning indoor unit 10 in the front-back direction) of the air-conditioning indoor unit 10, and the flat surface of the front side of the indoor unit 10 is provided with the air outlet, which affects the overall aesthetic property of the indoor unit 10. In the embodiment, the air-conditioning indoor unit 10 with a circular appearance is completely improved, air supply of the air-conditioning indoor unit 10 is realized by adopting two air supply fans, the two air supply fans are relatively small in size, the accommodating space in the shell can be more reasonably distributed, and the overall volume and thickness of the air-conditioning indoor unit 10 can be greatly reduced; in addition, the upper air outlet 12a is formed at the upper part of the front side of the shell, the lower air outlet 12b is formed at the lower part of the front side of the shell, and the upper air outlet 12a and the lower air outlet 12b are mutually set off, so that the appearance of one air outlet is prevented from being abrupt visually, the whole appearance of the indoor unit 10 is more harmonious and beautiful, and the higher aesthetic requirements of users are met.
In some embodiments, the casing includes a rear casing 11 with an open front side and a front panel 12 located at the front side of the rear casing 11 and forming a receiving space with the rear casing 11, and accordingly, the projections of the rear casing 11 and the front panel 12 on a vertical plane carrying the air conditioning indoor unit 10 are both circular. The rear case 11 is formed with the above-mentioned air intake area 11a, the above-mentioned upper outlet 12a is formed on the upper portion of the front panel 12, and the above-mentioned lower outlet 12b is formed on the lower portion of the front panel 12.
In some embodiments, the diameter of the upper outlet 12a is equal to the diameter of the lower outlet 12b, and the ratio of the diameter of the upper outlet 12a to the diameter of the housing ranges from 0.2: 1 to 0.3: 1, for example, the ratio of the diameter size of the upper air outlet 12a to the diameter size of the housing is 0.26. In some embodiments, the upper outlet 12a and the lower outlet 12b are symmetrically arranged with respect to the transverse center line of the casing, and the upper outlet 12a and the lower outlet 12b are designed to be circular and symmetrically arranged, so as to meet the aesthetic standards of the public and further increase the aesthetic appearance and harmony of the indoor unit 10.
In some embodiments, the range of the ratio of the distance between the central point of the upper outlet 12a and the central point of the lower outlet 12b to the diameter of the housing is 0.6: 1 to 0.75: for example, the ratio of the distance between the center point of the upper outlet 12a and the center point of the lower outlet 12b to the diameter of the housing is 0.66. The positions and dimensions of the upper outlet 12a and the lower outlet 12b are designed in such a way that the dimensions and positions of the upper outlet 12a and the lower outlet 12b can be more harmoniously matched with the overall dimensions of the front panel 12, further increasing the aesthetic appearance and harmony of the indoor unit 10.
In some embodiments, there may be one air inlet area 11a, and one air inlet area 11a is formed in the casing at a position where both of the two blower fans can promote the air flow outside the indoor unit 10 into the casing through the air inlet area 11a, for example, the air inlet area 11a is formed in the upper or rear portion of the casing.
In some alternative embodiments, the number of the air inlet regions 11a may be two, and two air inlet regions 11a may be formed on both lateral sides of the housing, with a lateral direction (which may also be referred to as a left-right direction) as indicated in fig. 2. In some embodiments, the two air inlet regions 11a are symmetrically distributed with respect to the longitudinal center line of the casing, so as to further enhance the aesthetic appearance of the indoor unit 10.
As shown in fig. 2, the indoor unit 10 of the air conditioner of the present embodiment further includes a heat exchanger 13, and the heat exchanger 13 is disposed in the casing on the air intake area 11a and the air intake channel of the blower fan so as to exchange heat with the ambient air entering through the air intake area 11 a.
The position of the air inlet area 11a formed on the shell determines the position of the heat exchanger 13, in the embodiment that the air inlet area 11a is one, the air inlet area 11a is formed on the upper part of the shell, the heat exchanger 13 is one, and the heat exchanger 13 is arranged in the shell and positioned on the inner side of the air inlet area 11a, and the heat exchanger 13 is understood to be positioned on the upper part in the shell.
In the embodiment where two air inlet regions 11a are formed on both lateral sides of the housing, there are two heat exchangers 13, and the two heat exchangers 13 should correspond to the two air inlet regions 11a one-to-one, and are respectively disposed inside the corresponding air inlet regions 11a in the housing to exchange heat with the ambient air entering through the corresponding air inlet regions 11 a.
As shown in fig. 2, the projection of each heat exchanger 13 on the vertical plane carrying the indoor unit 10 of the air conditioner is arc-shaped to match with the corresponding air inlet area 11a, so as to increase the air inlet area, reduce the air inlet resistance, and improve the heat exchange efficiency of the heat exchanger 13. The circle centers of the arc-shaped heat exchangers 13 can coincide with the circle center of the shell, and the two heat exchangers 13 are symmetrically distributed relative to the vertical center line of the shell, so that the size of the heat exchangers 13 is ensured, and sufficient residual space can be provided for the arrangement of an air supply fan and other components in the shell.
In some embodiments, as shown in fig. 2, the indoor air conditioning unit 10 further includes a water pan 16, and the water pan 16 is located at the bottom of the heat exchanger 13 in the accommodating space inside the casing and is used for receiving the condensed water formed by the heat exchanger 13. As shown in fig. 2, two air inlet areas 11a are formed on two lateral sides of the housing, and in the scheme that two heat exchangers 13 are provided, two water trays 16 are provided, and the two water trays 16 correspond to the two heat exchangers 13 one by one and are respectively located at the bottoms of the corresponding heat exchangers 13. A drain opening (not shown) is formed at the bottom of each drip pan 16, and is connected to a drain pipe through which the condensed water received in the drip pan 16 is drained.
In some embodiments, as shown in fig. 2 and 3, both of the two blowing fans of the indoor unit 10 are centrifugal fans, which may be single-suction centrifugal fans 14 or double-suction centrifugal fans (not shown). The rotation axis of the centrifugal fan should extend in the transverse direction, the aforementioned vertical plane for bearing the indoor unit 10 of the air conditioner means a plane on which the indoor unit 10 of the air conditioner is vertically suspended from a vertical wall, and if the indoor unit 10 of the air conditioner is taken as a reference, a projection of a casing of the indoor unit 10 of the air conditioner on a plane parallel to the rotation axis of the centrifugal fan should be a circle.
In some embodiments, the transverse distance between the heat exchanger 13 and the fan inlet of the corresponding centrifugal fan may range from 40 to 70 mm, for example, the transverse distance is 57 mm.
As shown in fig. 2 and fig. 3, for the solution that both of the two blowing fans are single-suction centrifugal fans 14, it is preferable that an air inlet area 11a is formed on each of the two lateral sides of the casing, the rotating shafts of both of the two single-suction centrifugal fans 14 extend laterally, the two single-suction centrifugal fans 14 are located on the two lateral sides of the vertical center line of the casing, the fan air inlet 14a of one single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14, and the fan air inlet 14a of the other single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14, that is, the fan air inlets 14a of the two single-suction centrifugal fans 14 are opposite to each other and face the corresponding air inlet areas 11a, respectively, so as to promote the ambient air around the indoor unit 10 to enter the casing through the corresponding air inlet areas 11.
The fan outlet 14b of one of the centrifugal fans 14 faces upward, the fan outlet 14b of the other centrifugal fan 14 faces downward, and the centrifugal fan 14 with the fan outlet 14b facing upward is configured to cause a part of the air to flow through the air inlet area 11a corresponding to the centrifugal fan 14 into the housing, to exchange heat with the corresponding heat exchanger 13, and to flow toward the upper portion of the accommodating space, so that the part of the air is blown out from the upper air outlet 12 a. The single-suction centrifugal fan 14 with the downward fan outlet 14b is configured to cause a part of the air to flow through the air inlet area 11a corresponding to the single-suction centrifugal fan 14, enter the housing, exchange heat with the corresponding heat exchanger 13, and flow toward the lower portion of the accommodating space, so that the part of the air flows are blown out from the lower air outlet 12b, and air flows are blown out from both the upper air outlet 12a and the lower air outlet 12 b.
In some embodiments, as shown in fig. 2 and 3, to guide the airflow to the upper air outlet 12a and the lower air outlet 12b respectively, the air conditioning indoor unit 10 further includes two fairings 15 corresponding to the two single-suction centrifugal fans 14, and the fairings 15 are configured to guide the airflow at the fan air outlet 14b of the corresponding single-suction centrifugal fan 14 to the corresponding air outlet, that is, the fairing 15 corresponding to the single-suction centrifugal fan 14 facing upward at the fan air outlet 14b guides the airflow at the fan air outlet 14b of the single-suction centrifugal fan 14 to the upper air outlet 12a, so that the airflow is blown forward by the upper air outlet 12 a; the air guide sleeve 15 corresponding to the single-suction centrifugal fan 14 with the fan outlet 14b facing downward guides the air flow at the fan outlet 14b of the single-suction centrifugal fan 14 to the lower outlet 12b, so that the air flow is blown forward from the lower outlet 12 b.
Fig. 4 is a schematic structural view of a guide cover of an air-conditioning indoor unit according to an embodiment of the present invention
In some embodiments, as shown in fig. 3 and 4, each air guide sleeve 15 has an air collecting cavity communicated with the fan outlet 14b of the corresponding single-suction centrifugal fan 14 and an air guide duct communicated with the air collecting cavity, and an air guide outlet 15b opposite to the corresponding air outlet (the upper air outlet 12a or the lower air outlet 12b) is formed at a front side of the air guide duct to guide the air flow to the corresponding air outlet.
Specifically, in the present embodiment, as shown in fig. 4, the pod 15 includes a horizontal wall 151 extending forward and rearward, a curved wall 152, a front side wall 153, a rear side wall (not identified), and an arc-shaped partition wall 154. Wherein, the horizontal wall 151 is formed with a diversion air inlet 15a communicated with a fan air outlet 14b of a corresponding single suction type centrifugal fan 14, one end of the curved wall 152 in the circumferential direction is connected with one end of the horizontal wall 151 in the transverse direction, and the other end of the curved wall 152 in the circumferential direction is connected with the other end of the horizontal wall 151 in the transverse direction, thereby defining a cavity with the horizontal wall 151; the front side wall 153 connects the front side of the horizontal wall 151 with the front side of the curved wall 152 to seal the front side of the pod 15 to seal the front side of the cavity, and the rear side wall connects the rear side of the horizontal wall 151 with the rear side of the curved wall 152 to seal the rear side of the pod 15 to seal the rear side of the cavity; the arc-shaped partition wall 154 is formed in the cavity to partition the cavity into the air collecting cavity and the air guiding duct, the arc-shaped partition wall 154 is formed with an opening communicating the air collecting cavity and the air guiding duct, and the front side wall 153 is formed with the air guiding outlet 15b opposite to the air guiding duct. The air guide sleeve 15 formed by the method is provided with an air collecting cavity, and air flow flowing out of the fan air outlet 14b of the single-suction centrifugal fan 14 enters the air collecting cavity of the air guide sleeve 15 and is mixed in the air collecting cavity, so that the uniformity of air outlet is ensured; in addition, the airflow guide cover 15 with the special shape is matched with the single-suction centrifugal fan 14 to realize smooth transition air supply, reduce airflow loss and turbulence, thereby improving air supply efficiency and reducing noise.
In some embodiments, as shown in fig. 3 and 4, the air guiding duct defined by the curved partition wall 154 and the curved wall 152 is preferably a cylindrical structure, that is, a portion of the curved wall 152 opposite to the curved partition wall 154 is in a circular arc shape formed with the curved partition wall 154 to define the air guiding duct in the cylindrical structure, so that the cylindrical air guiding duct matches with a corresponding circular air outlet in shape, and an air flow in the air guiding duct is directly blown forward through the corresponding air outlet, thereby improving smoothness of air flow delivery, reducing air flow loss, and further improving air supply efficiency.
It will be appreciated that the centrifugal fan 14 of the single-suction type generally comprises a volute 141 having a receiving chamber and an impeller (not shown) disposed in the receiving chamber, in this embodiment, the receiving chamber extends transversely, the receiving chamber has a fan inlet 14a, the volute 141 has a fan outlet 14b communicating with the receiving chamber, and the impeller is rotatable about a transverse axis relative to the volute 141.
In some embodiments, to reduce the overall size of the entire indoor unit 10, two efficient centrifugal fans are needed to supply air, so as to improve the performance requirement on the basis of meeting the external size of the indoor unit 10. From the centrifugal fan pressure loss, two single-suction backward centrifugal fans were determined as the two blowing fans of the present embodiment by means of simulation analysis, and each of the single-suction backward centrifugal fans satisfied the following conditions:
the blade installation outlet angle β b2 of the impeller of each single-suction backward centrifugal fan is equal to or less than 30 degrees and equal to or less than β b2 and equal to or less than 40 degrees, for example, the blade installation outlet angle β b2 of each single-suction backward centrifugal fan is equal to or less than 35 degrees, the specific rotating speed ns of each single-suction backward centrifugal fan is equal to or less than 58 and equal to or less than 60 degrees, for example, the specific rotating speed ns of each single-suction backward centrifugal fan is 59.48 degrees, the peripheral speed u2 of each single-suction backward centrifugal fan is equal to or less than 11 and equal to or less than u2 and equal to or less than 12 meters per second, for example, the peripheral speed u2 of each single-suction backward centrifugal fan is equal to or less than 11.83 meters per second, the total pressure coefficient Ψ of each single-suction backward centrifugal fan is equal to or less than 0.7 and equal to or less than 0.9 degrees, for example.
In addition, the pressure loss of the single-suction backward centrifugal fan can be reduced and the intake air amount of the single-suction backward centrifugal fan can be increased by limiting the installation outlet angle β b2, the specific speed ns, the peripheral speed u2 and the full pressure coefficient psi of the single-suction backward centrifugal fan to the above special numerical range, and meanwhile, the size of each single-suction backward centrifugal fan can be adjusted to a lower size on the premise of ensuring the above better performance of the single-suction backward centrifugal fan, for example, each single-suction backward centrifugal fan satisfies phi 120 x 80mm, the diameter of a volute is 120 mm, and the thickness is 80 mm.
This ensures that the overall size of the indoor unit 10 can be adjusted to a lower size, for example, 500 x 200mm as the overall size of the casing, that is, 500 mm as the diameter of the casing and 220 mm as the thickness of the casing. The diameter of the upper air outlet 12a and the diameter of the lower air outlet 12b can be 120 mm, so that the overall size of the indoor unit 10 is reduced on the premise of ensuring the air supply performance of the indoor unit 10, and the requirement of a user on the miniaturization appearance of the indoor unit 10 of the air conditioner is met.
Fig. 5 is an exploded view of an air conditioning indoor unit 10 according to another embodiment of the present invention.
In some embodiments, as shown in fig. 5, both of the two blower fans are axial fans 107, wherein one axial fan 107 is configured to cause a portion of the airflow to flow from the air inlet area 11a to the upper air outlet 12a, so that a portion of the airflow blows from the upper air outlet 12a, and the other axial fan 107 is configured to cause a portion of the airflow to flow from the air inlet area 11a to the lower air outlet 12b, so that a portion of the airflow blows from the lower air outlet 12b, so that the airflow blows from both the upper air outlet 12a and the lower air outlet 12 b.
One of the axial fans 107 is located above the other axial fan 107, the upper axial fan 107 is located behind the upper air outlet 12a and configured to promote a part of the air flow from the air inlet area 11a to the upper air outlet 12a, and the lower axial fan 107 is located behind the lower air outlet 12b and configured to promote a part of the air flow from the air inlet area 11a to the lower air outlet 12 b.
In some embodiments of the present invention, the air inlet area 11a is one, the air inlet area 11a may be formed at the rear of the housing or at the upper portion of the housing or at the lateral side of the housing, and the axial fan 107 is configured to rotate around an axis extending forward and backward to promote the air flow to flow forward. Each axial fan 107 should be spaced from the rear wall of the casing to form a space for air to flow through, and under the action of the axial fan 107, the air flow enters the casing through the air inlet area 11a, flows backwards, flows forwards from the back to the corresponding air outlet, and blows forwards.
In a preferred embodiment, there are two air inlet areas 11a, two air inlet areas 11a are respectively formed on two lateral sides of the casing, the axial fans 107 are configured to rotate around axes extending forward and backward, each axial fan 107 is spaced from the rear wall of the casing, the upper axial fan 107 causes a part of the air flow entering the casing from the two air inlet areas 11a to flow forward to the upper air outlet 12a, and the lower axial fan 107 causes a part of the air flow entering the casing from the two air inlet areas 11a to flow forward to the lower air outlet 12b, so as to increase the air inlet amount of the indoor unit 10 and improve the air supply efficiency.
Fig. 6 is a schematic structural view of one direction of the outlet duct 18 of the air-conditioning indoor unit 10 according to an embodiment of the present invention, and fig. 7 is a schematic sectional view of the outlet duct 18 of the air-conditioning indoor unit 10 according to an embodiment of the present invention.
In some embodiments, referring again to fig. 5, 6 and 1 to 3, the indoor unit 10 of the air conditioner further includes two air outlet pipes 18 extending back and forth and distributed up and down in the accommodating space, where the air outlet pipe 18 located above corresponds to the upper air outlet 12a and is communicated with a fan outlet of the blower fan for promoting a part of the air flow to the upper part of the accommodating space; the lower outlet duct 18 corresponds to the lower outlet 12b and communicates with the fan outlet of the blower fan for causing a part of the air flow to flow toward the lower portion of the accommodating space.
The outlet duct 18 is configured to be controllably movable in the front-rear direction between a position protruding out of the front side of the outlet of the corresponding indoor unit 10 and a position retracted into the outlet of the corresponding indoor unit 10, that is, the outlet duct 18 located above is configured to be controllably movable in the front-rear direction between a position protruding out of the front side of the upper outlet 12a and a position retracted into the upper outlet 12a, and the outlet duct 18 located below is configured to be controllably movable in the front-rear direction between a position protruding out of the front side of the lower outlet 12b and a position retracted into the lower outlet 12 b.
Specifically, as shown in fig. 6 and 7, each of the air outlet pipes 18 includes an outer pipe 181 extending forward and backward and a first inner pipe 182 connected to an inner peripheral wall of the outer pipe 181 and extending from the rear to the front in a gradually expanding manner to protrude from the front side of the outer pipe 181, and a first separation space 103 is formed between the inner peripheral wall of the outer pipe 181 and an outer peripheral wall of the first inner pipe 182, that is, the first inner pipe 182 has a horn-shaped structure from the rear to the front, and the outer pipe 181 and the first inner pipe 182 form a circular pipe, and in a normal state, a part of the air flow may flow forward through an inner space of the first inner pipe 182, and a part of the air flow may flow forward through the first.
When the air outlet pipe 18 is controlled to retract back to the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe 182 abuts against the inner peripheral wall of the corresponding air outlet to close the first spacing space 103, so that the air flow is blown out from the first inner pipe 182 to the front side only. That is, when the upper outlet pipe 18 is controlled to retract to the position in the upper outlet 12a, the outer peripheral wall of the outlet end of the first inner pipe 182 of the outlet pipe 18 abuts against the inner peripheral wall of the upper outlet 12a, and the airflow flowing to the upper part of the accommodating space in the housing is blown out forward from the first inner pipe 182 of the upper outlet pipe 18 only; when the lower outlet pipe 18 is controlled to retract to the position in the lower outlet 12b, the outer peripheral wall of the outlet end of the first inner pipe 182 of the outlet pipe 18 abuts against the inner peripheral wall of the lower outlet 12b, and the airflow flowing to the lower portion of the accommodating space in the housing is blown out forward only from the first inner pipe 182 of the lower outlet pipe 18.
When the air outlet pipe 18 is controlled to move forward to a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe 182 protrudes out of the front side of the corresponding air outlet, because the first inner pipe 182 is gradually enlarged from back to front, it can be understood that the outer diameter of the front section of the first inner pipe 182 is larger than that of the rear section, when the air outlet pipe 18 moves forward, the air outlet end of the first inner pipe 182 is separated from the inner peripheral wall of the corresponding air outlet, and the air outlet end of the first inner pipe 182 protrudes out of the front side of the corresponding air outlet, so that the space (the first spacing space 103) between the outer wall of the first inner pipe 182 and the inner wall of the outer pipe 181 is exposed, and therefore, airflow in the first inner pipe 182 and the first spacing space 103 is blown.
Compared with the traditional air outlet, in the embodiment, each air outlet pipe 18 is designed into the square-shaped structure, so that the air outlet range can be enlarged, and the wide-area air supply effect is realized; and the airflow is diffused around the front side of the air outlet corresponding to the indoor unit 10, and the air around the air outlet is sucked and flows forwards, so that the air supply uniformity is improved, the air is softer and more natural, the user feels cool but not cold when blowing the air onto the body, and the comfort of the user is improved. In addition, by controlling the air outlet pipe 18 to move between the position retracted into the corresponding air outlet and the position protruded out of the front side of the corresponding air outlet, when the air outlet pipe 18 protrudes out of the front side of the corresponding air outlet, airflow is blown out forwards in the first inner pipe 182 and the first spacing space 103, the air outlet range is expanded, the air supply distance is lengthened, and the air supply uniformity and comfort are further improved; in addition, because the airflow is divided into two parts, one part of the airflow is directly blown out forwards from the first inner pipe 182, and the other part of the airflow is directly blown out forwards from the first separation space 103, the eddy loss is effectively reduced, and the air supply efficiency is improved.
In some embodiments, referring again to fig. 6 and 7, each air outlet pipe 18 further includes a second inner pipe 183, the second inner pipe 183 extends in the corresponding first inner pipe 182 in a diverging manner from the rear to the front, and a second spacing space 104 is formed between the outer peripheral wall of the second inner pipe 183 and the inner peripheral wall of the corresponding first inner pipe 182. When the air outlet pipe 18 retracts to the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe 182 abuts against the inner peripheral wall of the corresponding air outlet to seal the first spacing space 103, and air flows are blown out forwards from the second spacing space 104 and the second inner pipe 183. When the air outlet pipe 18 is located at a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner pipe 182 protrudes from the front side of the corresponding air outlet to expose the first space 103, so that the heat exchange air flows in the first space 103, the second space 104 and the second inner pipe 183 are blown out forward.
By additionally arranging the second inner pipe 183 in the shape, a second spacing space 104 is formed between the first inner pipe 182 and the second inner pipe 183, so that the air outlet range is further expanded, the air flow is blown forward more dispersedly, the blown air flow is mixed with the surrounding indoor environment air flow, and the air supply uniformity and comfort are further improved.
The first inner tube 182 is connected to the inner peripheral wall of the outer tube 181 by a bracket (not shown in fig. 7), and the second inner tube is connected to the inner peripheral wall of the first inner tube 182 by another bracket (not shown in fig. 7), which plays a role of fixing the first inner tube 182 and the second inner tube 183, and has a small size, thereby preventing the air flow from being blocked. For example, a plurality of first connecting rods (not shown) constituting the aforementioned bracket are spaced apart from the outer circumferential wall of the first inner tube 182 in the circumferential direction, and the first inner tube 182 is fixed to the outer tube by the plurality of spaced apart first connecting rods. Correspondingly, a plurality of second connecting rods (not shown) are distributed on the peripheral wall of the second inner tube 183, and the plurality of second connecting rods form the other bracket, and the second inner tube 183 is fixed on the first inner tube 182 through the plurality of second connecting rods distributed at intervals.
The movement of the two air outlet pipes 18 can be controlled according to the operation mode of the indoor unit 10 of the air conditioner. Specifically, the control unit is further configured to control the air outlet duct 18 corresponding to the upper air outlet 12a to move to a position protruding out of the front side of the upper air outlet 12a in the cooling mode, and control the air outlet duct 18 corresponding to the lower air outlet 12b to move to a position protruding out of the front side of the lower air outlet 12b in the heating mode.
As can be understood from the foregoing description, during the operation of the indoor unit 10, the movement of the two outlet pipes 18 and the states of the two blower fans can be controlled according to the operation mode of the indoor unit 10. For example, in the cooling mode, the air outlet duct 18 corresponding to the upper air outlet 12a can be controlled to move to a position protruding from the front side of the upper air outlet 12a, and the blower fan for driving part of the air flow to the upper part of the accommodating space in the housing is controlled to be turned on; the air outlet pipe 18 corresponding to the lower air outlet 12b can be kept in the lower air outlet 12b and does not move forward, accordingly, the corresponding air supply fan (namely the air supply fan which causes part of the air flow to the lower part of the accommodating space in the shell) keeps a closed state, and cold air is blown forward only through the air outlet pipe 18 positioned at the upper part, so that the air outlet position of the cold air is raised, and discomfort of a user caused by the fact that the cold air is blown downward and directly to the user is avoided. Because cold wind has the trend of sinking, make cold wind upwards blow as far as possible, promote refrigeration effect, and avoid cold wind directly to blow the human body and influence user's refrigeration experience. In addition, because the air outlet pipe 18 positioned at the upper part moves forwards to protrude out of the front side of the upper air outlet 12a, the air supply range is expanded, the air supply uniformity is improved, and the refrigeration comfort experience of a user is further enhanced.
In the heating mode, the air outlet pipe 18 corresponding to the lower air outlet 12b can be controlled to move to a position protruding out of the front side of the lower air outlet 12b, and the air supply fan corresponding to the air outlet is controlled to be opened (i.e. the air supply fan which causes part of the air flow to the lower part of the accommodating space in the shell), while the air outlet pipe 18 corresponding to the upper air outlet 12a can be kept in the upper air outlet 12a and does not move forward, correspondingly, the air supply fan corresponding to the air outlet (i.e. the air supply fan which causes part of the air flow to the upper part of the accommodating space in the shell) keeps a closed state, hot air is blown out forward only through the air outlet pipe 18 positioned at the lower part, the hot air outlet position is lowered, and the situation that the temperature of the. Because hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved. In addition, because the air outlet pipe 18 positioned at the lower part moves forwards to protrude out of the front side of the lower air outlet 12b, the air supply range is expanded, the air supply uniformity is improved, and the heating comfort experience of a user is further enhanced.
In this embodiment, referring to fig. 2, fig. 3 and fig. 5 again, the indoor air conditioner unit 10 further includes an electronic control board 17, the electronic control board 17 is disposed between the two air supply fans, the electronic control board 17 is configured to control operations of the two air supply fans, and in some embodiments, the aforementioned control unit is disposed on the electronic control board 17. The electric control board 17 is arranged in the space between the two air supply fans, so that the arrangement of all parts in the shell is compact and orderly, and the overall size of the indoor unit 10 is further reduced.
In some embodiments, as shown in fig. 7, the inner peripheral wall of the outer tube 181 of each outlet duct 18 includes a rear wall section 181a and a front wall section 181b which are sequentially connected in the direction from the air inlet end to the air outlet end of the outer tube 181, the rear wall section 181a is a hollow truncated cone shape which is gradually expanded from the air inlet end of the outer tube 181 to the front, the front wall section 181b is a hollow truncated cone shape which is gradually expanded from the position connected to the rear wall section 181a to the air outlet end of the outer tube 181, and the taper angle 2e of the rear wall section 181a is greater than the taper angle 2c of the front. It is also understood that the inner peripheral wall of the outer tube 181 is divided into two sections from the rear end to the front end of the outer tube 181, namely, a rear wall section 181a and a front wall section 181b, the rear wall section 181a is flared from the rear to the front, the front wall section 181b is flared from the rear to the front, and the rear wall section 181a is more flared than the front wall section 181 b. As shown in fig. 7, the angle e is the angle between the wall surface of the rear wall section 181a and the horizontal line extending forward and backward, and the cone angle of the rear wall section 181a is 2 e; the angle c is an included angle between the wall surface of the front wall section 181b and a horizontal line extending forward and backward, and the taper angle of the front wall section 181b is 2 c.
The air inlet end of the first inner tube 182 is positioned in the space formed by the front wall section 181b to form a first spacing space 103 between the front wall section 181b and the outer peripheral wall of the first inner tube 182, so that the air flow is ensured to enter the outer tube 181, the air flow is mixed and combed in the rear wall section 181a of the outer tube 181, and then flows forwards and is blown out along different flow paths, thereby reducing the eddy current loss. The distance from the air inlet end of the first inner tube 182 (i.e., the rear end of the first inner tube 182) to the rear end of the front wall section 181b of the outer tube 181 is substantially the same as the distance from the front end of the front wall section 181b (i.e., the air outlet end of the outer tube 181).
In some embodiments, as shown in fig. 7, the first inner tube 182 has a hollow truncated cone shape with a uniform wall thickness gradually expanding from the air inlet end to the air outlet end, and the taper angle 2b of the first inner tube 182 is greater than the taper angle 2c of the front wall section 181b of the outer tube 181, it can also be understood that the first inner tube 182 has a flaring shape from the rear end to the front end.
In some embodiments, as shown in fig. 7, the second inner tube 183 of the outlet duct 18 extends in a divergent manner from the rear to the front inside the corresponding first inner tube 182, and it is understood that the second inner tube 183 is integrally located in the first inner tube 182, and has a trumpet shape from the rear to the front, and the outer peripheral wall of the second inner tube 183 has a truncated cone shape from the rear to the front. The inner peripheral wall of the second inner tube 183 is a truncated cone shape gradually expanding from the air inlet end to the air outlet end of the second inner tube 183, that is, the inner peripheral wall of the second inner tube 183 is a truncated cone shape gradually expanding from back to front. The taper angle 2d of the inner peripheral wall of the second inner tube 183 is larger than the taper angle 2a of the outer peripheral wall of the second inner tube 183, and the taper angle 2a of the outer peripheral wall of the second inner tube is equal to the taper angle 2c of the front wall section 181b of the outer tube 181.
By defining the inner peripheral wall of the outer pipe 181 as the above structure and defining the shapes of the first inner pipe 182 and the second inner pipe 183 as the above structure, the first spacing space 103 (the space between the outer pipe 181 and the first inner pipe 182), the second spacing space 104 (the space between the first inner pipe 182 and the second inner pipe 183) and the space inside the second inner pipe 183 defined thereby split the air flow, thereby widening the air outlet range, further reducing the eddy current loss and improving the air supply efficiency; and the air outlet is softer and more uniform.
In some embodiments, the taper angle 2c of the front wall section 181b satisfies: 0 ° <2a ≦ 2c ≦ 40 °, and the cone angle 2e of the rear wall section 181a satisfies: 0 <2e < 50, for example, the cone angle 2c of the front wall section 181b is 7.8 and the cone angle 2e of the rear wall section 181a is 46.2. In some embodiments, the taper angle 2b of the first inner tube 182 may satisfy: 20 degrees <2b is less than or equal to 80 degrees, and the taper angle 2d of the inner peripheral wall of the second inner pipe 183 can satisfy: 30 <2d < 60 °, for example, the taper angle 2b of the first inner tube 182 is 60 °, and the taper angle 2d of the inner peripheral wall of the second inner tube 183 is 45 °. The air outlet pipe 18 formed by the method can further reduce the eddy loss and improve the air supply efficiency.
Referring to fig. 3 to 6 again, the indoor air conditioner unit 10 of the present embodiment further includes two driving units, the two driving units correspond to the two air outlet pipes 18 one by one, each driving unit may include a rack 102, a gear (not shown) and a motor (not shown) for driving the gear to rotate, the motor is disposed in the accommodating space of the housing, and the gear is engaged with the rack 102 to drive the corresponding air outlet pipe 18 to move between a position protruding out of the front side of the corresponding air outlet and a position retracting into the corresponding air outlet along the front-back direction.
The length dimension of the tooth section of the rack 102 engaged with the gear can be equal to or greater than the distance dimension between the air outlet end of the corresponding outer pipe 181 and the air outlet end of the first inner pipe 182, so as to ensure that the air outlet pipe 18 moves forward to a position where the part of the first inner pipe 182 located at the front side of the outer pipe 181 completely extends out of the air outlet corresponding to the indoor unit 10, so as to further increase the air outlet range and the air supply distance, and improve the air supply efficiency and the air outlet uniformity.
In the solution that both the two blowing fans are single-suction centrifugal fans 14, in one embodiment, referring to fig. 3, the air inlet ends (i.e., the air inlet ends of the outer pipes 181) of the two air outlet pipes 18 can pass through the diversion air outlets 15b of the corresponding diversion hoods 15 and be located in the diversion air ducts, and the air inlet ends of the air outlet pipes 18 are in sliding contact with the corresponding diversion air duct air outlets 15b, and in the process of moving the air outlet pipes 18 back and forth, the rear segments of the air outlet pipes 18 are always located in the diversion air ducts of the corresponding diversion hoods 15. It can be understood that the size of the air outlet pipe 18, the size of the air guiding duct, and the size of the opening formed by the arc-shaped partition wall 154 and communicating the air collecting cavity and the air guiding duct are required to ensure that the heat exchange air can enter the air guiding duct through the air collecting cavity when the air outlet pipe 18 moves forwards or backwards.
In some embodiments of the present embodiment, the rack 102 may be formed on the outer peripheral wall of the corresponding outlet duct 18, extending from the front to the rear. Referring to fig. 3 and 4, two air guide ducts of two air guide hoods 15 are formed with notches 15c extending forward and backward in fit with the corresponding racks 102 on the air outlet duct 18, the racks 102 penetrate the notches 15c to expose the teeth of the racks 102 to the outside of the air guide ducts of the air guide hoods 15 so as to be engaged with the corresponding gears, thereby realizing the forward and backward movement of the air outlet duct 18 and maintaining the sealing performance of the air guide ducts, and the length of the racks 102 satisfies that the racks extend to the rear side of the air guide ducts along the corresponding notches 15c to ensure that the notches 15c of the air guide ducts are always covered by the racks 102 when the air outlet duct 18 moves forward, so as to ensure the sealing performance of the air guide ducts.
In the case where both of the two blowing fans are axial fans 107, referring again to fig. 5, it can be understood that the axial fans 107 generally include a fan housing and a wind wheel (not identified) disposed in an accommodating space inside the fan housing. The air inlet ends of the two air outlet pipes 18 (i.e. the air inlet ends of the outer pipes 181) can be sleeved on the outer peripheral wall of the fan housing of the corresponding axial flow fan 107 and can be in close contact with the fan housing in a sliding manner. In the forward and backward movement process of the air outlet duct 18, the rear section of the air outlet duct 18 is always sleeved on the outer peripheral wall of the fan housing of the corresponding axial flow fan 107, for example, in the forward or backward movement process of the air outlet duct 18, the rear sections 181a and 181b of the air outlet duct 18 are always in contact with the outer peripheral wall of the fan housing of the corresponding axial flow fan 107, so as to ensure the stability of the air outlet duct 18. In this embodiment, the gear and the motor of each driving unit are located at the rear end of the corresponding axial flow fan 107 in the accommodating space of the housing, and the rack 102 is formed on the outer peripheral wall of the outer tube 181 of the corresponding air outlet duct 18 and extends from the front to the rear end of the axial flow fan 107 to engage with the gear to realize the forward and backward movement of the air outlet duct 18.
The embodiment also provides an air conditioner control method, which comprises the following steps: the states of the two air supply fans are respectively controlled according to the operation mode of the air conditioner.
Specifically, in one embodiment, the controlling the states of the two blowing fans according to the operation mode of the air conditioner includes:
in the cooling mode, the blower fan for making partial airflow flow to the upper part of the holding space is controlled to be turned on. Under the action of the air supply fan, cold air flows to the upper part and is blown out forwards through the upper air outlet 12a, while the other air supply fan (the air supply fan which promotes partial air flow to flow towards the lower part of the accommodating space in the shell) keeps a closed state, and the cold air is blown out forwards only from the upper air outlet 12a, so that the air outlet position of the cold air is raised, and the discomfort of a user caused by the fact that the cold air is blown downwards and directly blown to the user is avoided. Because cold wind has the trend of sinking, make cold wind upwards blow as far as possible, promote refrigeration effect, and avoid cold wind directly to blow the human body and influence user's refrigeration experience.
In the heating mode, the blower fan for driving partial airflow to flow to the lower part of the holding space is controlled to be turned on. The air supply fan which promotes partial air flow to the lower part of the accommodating space is started, the other air supply fan (the air supply fan which promotes partial air flow to the upper part of the accommodating space in the shell) is closed, hot air is blown out forwards only from the lower air outlet 12b, the hot air outlet position is reduced, and the situation that the temperature of the indoor lower space cannot rise in time due to the fact that the hot air is blown upwards is avoided, and the heating experience of a user is influenced. Because hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved.
In another embodiment, the controlling the states of the two blowing fans according to the operation mode of the air conditioner includes: in the refrigeration mode, the two air supply fans are controlled to be started simultaneously, the air supply fan which enables partial air flow to the upper part of the accommodating space is controlled to operate at a first rotating speed, and the air supply fan which enables partial air flow to the lower part of the accommodating space is controlled to operate at a second rotating speed; wherein the first rotational speed is greater than the second rotational speed. That is to say, during the refrigeration mode, two air supply fans operate with different rotational speeds, and the air supply fan that control corresponds with last air outlet operates with higher wind speed, increases the air output of last air outlet, and the cold wind that blows off by last air outlet sinks, reduces indoor ambient temperature fast.
After the air supply fan for causing part of the air flow to the upper part of the accommodating space is operated at a first rotating speed and the air supply fan for causing part of the air flow to the lower part of the accommodating space is operated at a second rotating speed, the control method of the air conditioner further comprises the following steps: monitoring the indoor environment temperature; and if the indoor environment temperature reaches the preset temperature, reducing the first rotating speed of the air supply fan for promoting partial air flow to the upper part of the accommodating space. That is to say, when the indoor ambient temperature reduces to a certain temperature, in order to avoid the indoor ambient temperature to hang down excessively, can reduce the air output of air outlet to this keeps the indoor environment in suitable temperature range.
In still another embodiment, the control method of an air conditioner further includes:
in the refrigeration mode, the air outlet pipe corresponding to the upper air outlet is controlled to move to a position protruding out of the front side of the upper air outlet;
and in the heating mode, the air outlet pipe corresponding to the lower air outlet is controlled to move to a position protruding out of the front side of the lower air outlet.
In conjunction with the foregoing description, as shown in fig. 8, in one embodiment, a method for controlling a cold air conditioner includes:
s802: in the refrigeration mode, the air supply fan which causes partial airflow to flow to the upper part of the accommodating space is controlled to be started, and the air outlet pipe corresponding to the upper air outlet is controlled to move to a position protruding out of the front side of the upper air outlet;
accordingly, the corresponding air supply fan (i.e. the air supply fan which causes part of the air flow to the lower part of the accommodating space in the shell) is kept in a closed state, and the cold air is blown out forwards only through the air outlet pipe 18 positioned at the upper part, so that the air outlet position of the cold air is raised, and the discomfort of the user caused by the fact that the cold air is blown downwards and directly to the user is avoided. Because cold wind has the trend of sinking, make cold wind upwards blow as far as possible, promote refrigeration effect, and avoid cold wind directly to blow the human body and influence user's refrigeration experience. In addition, because the air outlet pipe 18 positioned at the upper part moves forwards to protrude out of the front side of the upper air outlet 12a, the air supply range is expanded, the air supply uniformity is improved, and the refrigeration comfort experience of a user is further enhanced.
S804: and in the heating mode, the air supply fan which enables partial air flow to the lower part of the accommodating space is controlled to be started, and the air outlet pipe corresponding to the lower air outlet is controlled to move to the position protruding out of the front side of the lower air outlet.
Correspondingly, the corresponding air supply fan (namely the air supply fan which causes partial air flow to the upper part of the accommodating space in the shell) keeps a closed state, hot air is blown out forwards only through the air outlet pipe 18 positioned at the lower part, the hot air outlet position is reduced, and the situation that the temperature of the indoor lower space cannot rise in time due to rising of hot air is avoided, so that the heating experience of a user is influenced. Because hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved. In addition, because the air outlet pipe 18 positioned at the lower part moves forwards to protrude out of the front side of the lower air outlet 12b, the air supply range is expanded, the air supply uniformity is improved, and the heating comfort experience of a user is further enhanced.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. An air conditioner control method, wherein an indoor unit of the air conditioner includes:
a casing which is provided with an air inlet area, an upper air outlet is formed at the upper part of the front side of the casing, and a lower air outlet is formed at the lower part of the front side of the casing;
two air supply fans arranged in the accommodating space inside the shell, wherein one air supply fan is configured to promote partial air flow to flow from the air inlet area to the upper part of the accommodating space so as to enable the partial air flow to be blown out from the upper air outlet, and the other air supply fan is configured to promote partial air flow to flow from the air inlet area to the lower part of the accommodating space so as to enable the partial air flow to be blown out from the lower air outlet;
the control method of the air conditioner comprises the following steps:
and respectively controlling the states of the two air supply fans according to the running mode of the air conditioner.
2. The control method according to claim 1, wherein the step of controlling the states of the two blower fans according to the operation mode of the air conditioner includes:
in the cooling mode, the air supply fan for driving partial air flow to the upper part of the accommodating space is controlled to be started;
and in the heating mode, the air supply fan for promoting partial airflow to flow to the lower part of the accommodating space is controlled to be started.
3. The control method according to claim 1, wherein the step of controlling the two blower fans respectively according to the operation mode of the air conditioner includes:
in the cooling mode, the two air supply fans are controlled to be started simultaneously, the air supply fan which enables partial air flow to the upper part of the accommodating space is controlled to operate at a first rotating speed, and the air supply fan which enables partial air flow to the lower part of the accommodating space is controlled to operate at a second rotating speed; the first rotational speed is greater than the second rotational speed.
4. The control method according to claim 3, further comprising, after the air supply fan causing the partial air flow to flow toward the upper portion of the accommodating space is operated at a first rotation speed and the air supply fan causing the partial air flow to flow toward the lower portion of the accommodating space is operated at a second rotation speed:
monitoring the indoor environment temperature;
and if the indoor environment temperature reaches the preset temperature, reducing the first rotating speed of the air supply fan for promoting partial air flow to the upper part of the accommodating space.
5. The control method according to claim 2, wherein
The upper air outlet and the lower air outlet are marked as two air outlets of the indoor unit;
the indoor unit also comprises two air outlet pipes extending forwards and backwards, wherein one air outlet pipe is positioned above the other air outlet pipe, and the air outlet pipe positioned above corresponds to the upper air outlet and is communicated with the fan air outlet of the air supply fan for promoting partial air flow to the upper part of the accommodating space; the air outlet pipe positioned below corresponds to the lower air outlet and is communicated with a fan air outlet of the air supply fan for promoting partial airflow to flow to the lower part of the accommodating space;
each air outlet pipe is configured to be controllably moved along the front-back direction between a position protruding out of the front side of the corresponding air outlet and a position retracting into the corresponding air outlet;
each air outlet pipe comprises an outer pipe extending forwards and backwards, a first inner pipe connected to the inner peripheral wall of the outer pipe and extending forwards in a gradually expanding manner from the back to the front side of the outer pipe, and a second inner pipe extending forwards in a gradually expanding manner from the back to the front in the corresponding first inner pipe; the first inner pipe air inlet end is positioned in the outer pipe and close to the front end of the outer pipe, a first spacing space is formed between the outer peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe, and a second spacing space is formed between the outer peripheral wall of the second inner pipe and the inner peripheral wall of the first inner pipe;
when the air outlet pipe retracts to the corresponding position in the air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted to the inner peripheral wall of the corresponding air outlet so as to seal the first spacing space, so that part of air flow is blown out from the second spacing space to the front side, and part of air flow is blown out from the first inner pipe to the front side;
when the air outlet pipe is positioned at a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes out of the front side of the corresponding air outlet to expose the first spacing space, so that part of air flow blows out from the first spacing space to the front side, part of air flow blows out from the second spacing space to the front side, and part of air flow blows out from the first inner pipe to the front side;
the control method of the air conditioner further includes:
in the refrigeration mode, the air outlet pipe corresponding to the upper air outlet is controlled to move to a position protruding out of the front side of the upper air outlet;
and in the heating mode, the air outlet pipe corresponding to the lower air outlet is controlled to move to a position protruding out of the front side of the lower air outlet.
6. An indoor unit of an air conditioner, comprising:
a casing which is provided with an air inlet area, an upper air outlet is formed at the upper part of the front side of the casing, and a lower air outlet is formed at the lower part of the front side of the casing;
two air supply fans arranged in the accommodating space inside the shell, wherein one air supply fan is configured to promote partial air flow to flow from the air inlet area to the upper part of the accommodating space so as to enable the partial air flow to be blown out from the upper air outlet, and the other air supply fan is configured to promote partial air flow to flow from the air inlet area to the lower part of the accommodating space so as to enable the partial air flow to be blown out from the lower air outlet;
and the control unit is configured to respectively control the states of the two air supply fans according to the operation mode of the air conditioner.
7. The indoor unit of air conditioner according to claim 6, wherein
The control unit is also configured to control the air supply fan which causes part of the air flow to the upper part of the accommodating space to be started when in a cooling mode; in the heating mode, the blowing fan for causing a part of the air flow to the lower part of the accommodating space is controlled to be turned on.
8. The indoor unit of air conditioner according to claim 6, wherein
The control unit is configured to control the two air supply fans to be started simultaneously, control the air supply fan which causes part of air flow to the upper part of the accommodating space to operate at a first rotating speed, and control the air supply fan which causes the other part of air flow to the lower part of the accommodating space to operate at a second rotating speed when in a cooling mode; the first rotational speed is greater than the second rotational speed.
9. The indoor unit of claim 8, further comprising:
the temperature sensor is used for monitoring the indoor environment temperature;
the control unit is further configured to reduce the first rotation speed of the blowing fan for causing a part of the airflow to flow toward the upper portion of the accommodating space when the indoor ambient temperature reaches a preset temperature.
10. The indoor unit of air conditioner according to claim 7, wherein
The upper air outlet and the lower air outlet are marked as two air outlets of the indoor unit;
the indoor unit also comprises two air outlet pipes extending forwards and backwards, wherein one air outlet pipe is positioned above the other air outlet pipe, and the air outlet pipe positioned above corresponds to the upper air outlet and is communicated with the fan air outlet of the air supply fan for promoting partial air flow to the upper part of the accommodating space; the air outlet pipe positioned below corresponds to the lower air outlet and is communicated with a fan air outlet of the air supply fan for promoting partial airflow to flow to the lower part of the accommodating space;
each air outlet pipe is configured to be controllably moved along the front-back direction between a position protruding out of the front side of the corresponding air outlet and a position retracting into the corresponding air outlet;
each air outlet pipe comprises an outer pipe extending forwards and backwards, a first inner pipe connected to the inner peripheral wall of the outer pipe and extending forwards in a gradually expanding manner from the back to the front side of the outer pipe, and a second inner pipe extending forwards in a gradually expanding manner from the back to the front in the corresponding first inner pipe; the first inner pipe air inlet end is positioned in the outer pipe and close to the front end of the outer pipe, a first spacing space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe, and a second spacing space is formed between the outer peripheral wall of the second inner pipe and the corresponding inner peripheral wall of the first inner pipe;
when the air outlet pipe retracts to the corresponding position in the air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted to the inner peripheral wall of the corresponding air outlet so as to seal the first spacing space, so that part of air flow is blown out from the second spacing space to the front side, and part of air flow is blown out from the first inner pipe to the front side;
when the air outlet pipe is positioned at a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes out of the front side of the corresponding air outlet to expose the first spacing space, so that part of air flow blows out from the first spacing space to the front side, part of air flow blows out from the second spacing space to the front side, and part of air flow blows out from the first inner pipe to the front side;
the control unit is also configured to control the air outlet pipe corresponding to the upper air outlet to move to a position protruding out of the front side of the upper air outlet in a refrigeration mode; and when in the heating mode, the air outlet pipe corresponding to the lower air outlet is controlled to move to a position protruding out of the front side of the lower air outlet.
CN201810942900.6A 2018-08-17 2018-08-17 Air conditioner control method and air conditioner indoor unit Active CN110864365B (en)

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JPS59215533A (en) * 1983-05-19 1984-12-05 Nippon Denso Co Ltd Blow-off opening of air conditioner
JPH04184040A (en) * 1990-11-15 1992-07-01 Nippondenso Co Ltd Device for spot air conditioner
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